我们根据文献[1,2]制作了以WO_3为基础的用于检测H_2,H_2S,C_ 2H_2和NH_4的烧结气敏材料,并对其气敏特性作了研究.1 实验条件实验中使用分析纯的WO_3粉未,主晶为单斜和三斜晶体结构,晶粒在22～26nm之间,选取粒度一般在0.5～3μm之间的WO_3作为基料,以4%wt的瓷土作粘合剂,烧结制成旁热 Based on the literature [1, 2], we fabricated sintered gas sensors based on WO_3 for the detection of H_2, H_2S, C_2H_2 and NH_4, and studied their gas sensing properties.1 Experimental conditions The experimental data Of WO_3 powder is not, the main crystal is monoclinic and triclinic crystal structure, the crystal grains between 22 ~ 26nm, select the particle size is generally between 0.5 ~ 3μm WO_3 as a base material to 4% wt of clay as a binder , Made of sintering next to the heat